Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e267acb0585486a3fb0a19bc44516e548789ffb3f682ad38d382fd9152e8a50' 
  AND token = 'ns1GE1Iaq0NyvcytvWFD23SEUHag1Q3bKnJKrMc2sTk=' 
  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"
    }
  }
}