Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbfff1ea7723144237c6d69ce5500e8e14c1488a099c823e8a699883a2f8baf6' 
  AND token = 'Pscx7ssKwj9c/zLE1w+thPN4I2C9OgbDTTa+7iArudg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}