Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cabf415b5483e53a06d8daea601b39bd9be8f7c965ad9b9d43a36b45067aa761' 
  AND token = 'k8KGG1JRM6QVeqjgYu8aXxfU/leqnet0wgyNPmUx3HA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}