Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14cdd81e0ae8e09d824639a3f15952b1323602e8a5fec88c38cbf71ae2bf1998' 
  AND token = 'd0NAi9x+xjidXuU6LseoxtSibu+jocQNEl4mHnieK4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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