SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d5835b3d773a63d27c928e314bd5cc4716e5d666b823f3348a76372bf8d8247' 
  AND token = 'Ukn27GW/TgKVvgwMFiDeEQBJ2vlg4faaQZRrZuBxgvo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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