Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbc56daa543c021a44e13c36e1e6016343572501abff953e1c20dd87ca0509c6' 
  AND token = 'lg30XWFy+RmZ3qHN9HiuYfFf6x9aeaPFuwsRjyUgOWs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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