Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '614295f34f37dbeffe6b55d993b480378bbb832212ed17933f6f154e455eeff4' 
  AND token = 'JnXhz3Ztd7J6hJDtUi39q+tteLwzU4qd+PHBOsUWM5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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