Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dcacf106bcb59eb0bf25f502a12dd387ed91a1dfaeaf5085979697343727e0e3' 
  AND token = 'XeEt4RciF9v6FkT9lmSI+SleA8NYISqvhM9cpelIyYQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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