Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c84faae4b259bdb11f29b16fc23fe9172397c5435d8dc6733ed5af99e4218b71' 
  AND token = 'CRZrMxzNVmuutPkGPxNruzYQS4ZoZtkiDYGpdzM0BUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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