Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85997d40467ed5db4d09ef42af074de7bed733e554a6133e52d6f374a2084e08' 
  AND token = 'RyU/HE5L6Kkh7ISYhlkT6GjiY3gk8+E8d51Ts9lPWK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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