Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ec156d881fbcfa3f3d76ddb7f79b9fa39573a60df450bda167f326df31eee47' 
  AND token = 'c0kegUTy7oSy843bs0bJhy6DTT5KaolDP34dBuyT7n4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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