Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '7c5dd2b04b0c102edd8d2ab54d77feda285a0f9074ac816e9c2867ffc076b616' 
  AND token = 'y2p83pLsocpVqi6y+P91z0noYSGGWsGv+IlrFmpZlUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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