Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '409126c78e64cc51153d083e2e57354f2817410a475e228095351fe6f74d9f82' 
  AND token = 'yM+eXQXrBRhhXfeioOCzsQg3z01saaIk+Qpbfh5H5Cg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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