Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed29a80a2e3830085379b3302ea380d414719fd5451cc4637e8df9a2e1d6571b' 
  AND token = 'EaTzPWlmDfsx0RGR28FbQezjpgsfuhJXMlFcudFvl3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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