Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1efcb3d9ce635d938dce197fa04d36f70457962d0049b03d84552e86232850d3' 
  AND token = 'fDdZZxmIMc+kb3m1ZDkcboSCtgxOghj0HX1ZgO7At28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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