Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a804112909dc57d04e896dfb46e77417ff6584f6ca0f95f8da585738f1416645' 
  AND token = 'pSSMbKRf4ECsrhb8ja45MdW0TWBZvL/960yUMJguLO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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