Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b570e446172e7be43dc4bd82097f8d756fb20e95e5e5e86e25cfdab919eceaff' 
  AND token = 'jpYzC+v5zJ0MOnosmfeWmEHWEMMwpe6QrOS9OQ7fMF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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