Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '079e0591fef37dbef62273059842b5fe69b4693b57266c64a31f1eadb36015d3' 
  AND token = 'QbVosORVP8ebaIrSbFCSW2vpNmc+paRCBxdvtd+Umjk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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