Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7659066b0650da55450cd817119e5c38b7285062e5220bb41bbe75a7619f3686' 
  AND token = 'lL40dTzMf3GbFKVOu+KVjj0jdJkCp00SCcxp/a8jIOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}