Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a824e44c40fee10225dbcfed4ec69082b31871a2117101005b685885b3e304db' 
  AND token = 'IibDTURuycZaXoSULuoPKXUv5nwmV+UoJY42vMYNFvw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00075

JSON explain

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