diff --git a/library/think/db/Query.php b/library/think/db/Query.php
index b6b8828e..a9d1a543 100644
--- a/library/think/db/Query.php
+++ b/library/think/db/Query.php
@@ -2187,8 +2187,8 @@ class Query
             } else {
                 $options['where']['AND'] = $where;
             }
-        } elseif (is_string($pk) && isset($options['where']['AND'][$pk]) && is_scalar($options['where']['AND'][$pk])) {
-            $key = 'think:' . $options['table'] . '|' . $options['where']['AND'][$pk];
+        } elseif (!isset($key) && is_string($pk) && isset($options['where']['AND'][$pk])) {
+            $key = $this->getCacheKey($options['where']['AND'][$pk], $options);
         }
         // 生成UPDATE SQL语句
         $sql = $this->builder->update($data, $options);
@@ -2339,6 +2339,18 @@ class Query
         return $resultSet;
     }
 
+    protected function getCacheKey($value, $options)
+    {
+        if (is_scalar($value)) {
+            $data = $value;
+        } elseif (is_array($value) && 'eq' == strtolower($value[0])) {
+            $data = $value[1];
+        }
+        if (isset($data)) {
+            return 'think:' . $options['table'] . '|' . $data;
+        }
+    }
+
     /**
      * 查找单条记录
      * @access public
@@ -2358,10 +2370,12 @@ class Query
         }
         // 分析查询表达式
         $options = $this->parseExpress();
-
+        $pk      = $this->getPk($options);
         if (!is_null($data)) {
             // AR模式分析主键条件
             $this->parsePkWhere($data, $options);
+        } elseif (!empty($options['cache']) && true === $options['cache']['key'] && is_string($pk) && isset($options['where']['AND'][$pk])) {
+            $key = $this->getCacheKey($options['where']['AND'][$pk], $options);
         }
 
         $options['limit'] = 1;
@@ -2371,7 +2385,7 @@ class Query
             $cache = $options['cache'];
             if (true === $cache['key'] && !is_null($data) && !is_array($data)) {
                 $key = 'think:' . (is_array($options['table']) ? key($options['table']) : $options['table']) . '|' . $data;
-            } else {
+            } elseif (!isset($key)) {
                 $key = is_string($cache['key']) ? $cache['key'] : md5(serialize($options));
             }
             $result = Cache::get($key);
@@ -2577,8 +2591,8 @@ class Query
             }
             // AR模式分析主键条件
             $this->parsePkWhere($data, $options);
-        } elseif (is_string($pk) && isset($options['where']['AND'][$pk]) && is_scalar($options['where']['AND'][$pk])) {
-            $key = 'think:' . $options['table'] . '|' . $options['where']['AND'][$pk];
+        } elseif (!isset($key) && is_string($pk) && isset($options['where']['AND'][$pk])) {
+            $key = $this->getCacheKey($options['where']['AND'][$pk], $options);
         }
 
         if (true !== $data && empty($options['where'])) {