Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bbadb57f25eb026739d9c570a6968a698697d6268758109ccbc61c65a6e7fcf' 
  AND token = '4vzHLihMJXgbcpw2+HMp9tE2fsYf1euJ6ZdPZcteBMg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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