Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c1c48ac7045f666bf7dc5e6f268c31100d93651047a25b04fbd7d5f7e145fe2' 
  AND token = 'SOLQnlu4G0lEHakuPBmbNfz9yNKlLPoiLYANAJ6Zj0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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