Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85810d8af99252de0ae3a3f83a4901dad55e4ce78f2aefceb724a922457ed696' 
  AND token = '5uDRgbi2ChQchLg7xj5cW3u+YkJZHZcpx9CxkfYRqQo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}