Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a8bd38d65aef888af7819307a72821b64be1789f1bce5b36e008b36e3b86efe' 
  AND token = 'OdE72DmkRaZEW6Gcd+q3qh5PKGHuqj0rZ7yMj25UWC0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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