Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40d8128379864312ee649385de59f14c68e28144e855ea11be03ef1d28c72bcd' 
  AND token = 'Xj7I40l6llCXjJbcwFo30t3ns6ZQK/7CRWaakCJXS8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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