Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1daeac599e4920840df839e14df19a48c263beff70bb0caf503e43a6042758f' 
  AND token = '1ZIqhcT/jNSm/HOinIf+/+INa5Enr9MX1HmIPLcQFrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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