Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '005d6a3a4b7698cb6e861d04f930ebcb0fec6470c2d53610840b38d31d923143' 
  AND token = 'iROsVRpR1/3hs0WrZvGOToD1fJz6XaN9Y25e4D0F4D8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}