Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d56570f847808519a04a5022414264eb5cea424d299160fdbad226e0d0b1c33' 
  AND token = 'GxAnfctHNYgZ09OBgmpUAbMLdVTqgGYPfwpAay4/jHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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