Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0bae986e9a3cedd2276d145271ace45839fa6f7c594871fa051868f35062ff5' 
  AND token = 'lNO1TUd0KzFo3ibVuF03rX6uRYuWdMj+4Wae+Lj1AFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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