Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '7b2c70a1a15f10193db6741eb579346d8a7d32eff37cf75953c6117552b68639' 
  AND token = 'xvn5xOy1v0Rpfp5pLf8K1f9hW5++IDn3RwNSo5eqdyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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