Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '735d09da0bf124f4ef9a286ed3348bc101fa4925f94d241a2dae0814a5b4f420' 
  AND token = 'eO/9Vb1tqB9Elbx8dFamCss2htcapSK6ZbRpQDPCfa8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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