Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c2fd42fb86f4a7cbcbab817b427fc386ab9ed1d7499fc0a0edd749bf2990a9b' 
  AND token = 'zYjSasaml9E1hgJTdW12ttKwtUDgvvwv7cpTo0VOslk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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