SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7713d02f5abfea1dba231b388365cd37a20ee919a9e4c7071f2a76852a49fef5' 
  AND token = 'm55Xkv++zigSZC47ez1p/jZlsVHzB4NAt+FWuiUJSS4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}