Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '368161e35dc5e60b287902b9b39658ca6d15563d93366644972d36fb062b0994' 
  AND token = 'ilfBq88lfPmc+Jr5xcAnkbJNLRDfcCKZ8FViU15fxaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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