Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efcf2e0110a243373ddcb30a6477410c0060ac13c56bbcace1025070ee05dff0' 
  AND token = 'yTMnxdLm53eJGMC0C3CgGJ4MF/sCrKl2yJyh3gtKLTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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