Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23ae23f7c6f695a8a789aefa79820b4a34ecd59ca1cfde1db7352227a76749cb' 
  AND token = 'MdAUdpjnN1pMfqRicMW3FszM3SIa1ugZe7lSVwnQT3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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