Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c36dfd3fbd0329424a977d54f43e60d5280c80d9095ab574195600696fa282d2' 
  AND token = 'Hzd0S/yC32ctHcP1mdf1GsHgZo+EiO1TzRsjrTqS5W0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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