Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8261f1e49338ddb87a2ff8e74f1dc8371a8b938c14505ec8fcc7b53aaf2ae619' 
  AND token = 'C8eorg5x6HJj1PZPva96pnjr0jszY1DySQ9sA7pAB/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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