Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b716076e1590b640408f9f1e96bb1400966f4f602550cee63eede8755fe57db' 
  AND token = 'nq7sOkWJFfR64Ekj5E6KNbggia7Cyq7i/SsUsaPq6PI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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