Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '681bb724bdfc031ae11963d536444ce4f266f14c9adab14248210ab4012dee24' 
  AND token = 'iGBZdCsRcvtgsrRcBnbjG6F0I/oi+uGMMW4usQYDSSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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