Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5f9ce49a7dac5df9a81a054511d6add865621e30acebd1ad202ffd441d58fff' 
  AND token = '1WPksTYU/05vXdvHykSvLmid1DkNf9pZiLejZ42Hkps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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