Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a9104cc93d6513c609a4746343b463bdabf18cc3e6b34f68fd743c1066e99c9' 
  AND token = 'HNW0rhffJtrNfpvKil4lmOwCv7LtfWBaYw4auRxnIGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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