Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0af5bbb7b8f9b603939e73fbe8f01680e6438e1f9e608dbdbd184f9cd4281168' 
  AND token = 'uNuhPkQuw+xvLvQwyV6ESTQbbojZl29sfD7YlQ7Wfos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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