Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c869e14d0f7641a668f3d04d3464af0daed54c6e0810f93375a7b8a06a73bc8b' 
  AND token = 'eelRx2UNLFzOid6Mn3YtULYQQs9AkjgaU2YClhDzbaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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