Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44239f3529ed74fd3475b95701eed9c9c49e80901cfd7eff375377120260dd38' 
  AND token = 'IiTocBt3uGJEsdo3vNVOsBHj5vGtnJYi+yDywRtEDLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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