Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f7050a5f2637283258e6caec9c940cf77181fc4030c260962df83a8ec1deb264' 
  AND token = '6RjMXDLrKJTAVCblX06wVEXZnWfHmPfmJ6f4XOVLV0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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