Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd227d1328855c9b7a08ba7a5a25da9c775c7d0fe12fe6a48b120061676c4c276' 
  AND token = 'yWOwigaqqq3s/r4KQ2zDJMW4tnFQKAh06/hiCtKwDAg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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