Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd541775c81fe9f45369f1c8f52ed2dc520d8384bc16f48164fbededacfa6de70' 
  AND token = 'Pqxj2NyzRsJGMNQVrIHmB+bIr0f281aJl1ujdRYinH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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