Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb562304232a49ebbf68fab8ce2317cdc8657b4cdda923d1ab75179e86702e6d' 
  AND token = 'qLINKtviidwNN+HO1ODKvO5mocdFicjKg+QSKqlRHmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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