Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a5de2c5242105d2a151b479c77e4b2be275f560c12f6d1bd3e3bb78ca8c5e8f' 
  AND token = 'T/xNEv8557d+O1+aGL9uZMZQ65YW+Mv7uyony/AnDAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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