Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04c0ec703e02880412df287749bf4ed8b5de93ffe4bb70e13bc4c0957c096b7d' 
  AND token = 'mOLqVTayeoFhs5swFfCtpBsGPo9/yO/iSoS0EvTl0hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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