Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '273d0d2d3149df75760731f21a82d548d56709f816ffc085dc393e0ab5173e32' 
  AND token = 'qAl7Q1a9cDUYmaJR+StARAs74lDDK5XZeLIPeF/sgEM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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