Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ec636a5160bb83727a50700a04f35f4fbb42a3edef287b5d641b5951ffead00' 
  AND token = 'z/wgkcCkMmKlWEDFDWUSmbSNtfX4LiyoHUZBeysc9F8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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