Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84fb72e7d91fb96d97d0309a60705d644d591c506c6b5f35234743095c1f0a68' 
  AND token = '0KkeoCKEeeuj7zETNUID3Bx2KsgBPKVckRt/cTv2rLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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