Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc181f10800f326c6ddbe1b1cd486dd216827c3f04a9f513c0bfec20b4f212f6' 
  AND token = 'cNVJ7O7sEzy1oziisn1CD36H4C+Mtv6Jeva7Cj7hVCw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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