Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67defa076e0110abac53cd09521efe2542ee377c7c36b523745649688f4a4d58' 
  AND token = 'vkcIGmT5/oOVar6sK43ptZvr2p8Xv4n8qfSkGTVdyF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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