Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20450ba8fe5b607862b221d9e21ef5d41c95166dcefe4424f392b27adef674ed' 
  AND token = 'LEiKWH6ANLpeXMA8Q4kklZgBx3a+VSoYRXmooESrrBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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