Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb30361bcd7cf1176c6308c5197248a153d80ccb396eba00d5f89996f73d6f59' 
  AND token = 'YY8pSk1/erCLTuzoSi5Id1HcoS84AaVUVaea7fdfdvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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