Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f36850f5eda9a6b68c61b083b97848b3dbe5acb1673ee046834beb2b7c47354' 
  AND token = 'T7CCxCiLmNGyp1QsSlDLFPsUOqdX+ZE1Am+YndXkg+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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