Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29ab9e0c9ad6c81654b85eaa6d5c436e35f60623844ae86b62192482e30223ef' 
  AND token = '3UfR1HgmmPgks9fZrYIglD0dOsyodxbeR0lG8DwJSJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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