Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a821ae7fd46d86dfa60fc1a817a60688d6dbb5bfe1fd694dc16d877ec514d7fa' 
  AND token = '0SfsnWVUp8AUm/4PGnHwgJ4WF0aZ6gdiiyuq4/K/ipM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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