SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0654e9d7fafad9ff526c672624c9656b1356dd1348eee786136f923372cd2d5a' 
  AND token = 'JRTIvn3GwgGWpg2nDgC8Qgh/iArwhylzhg1LZkS2Le4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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