Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '86fac2007b1ce77fb953beb2ff2394c85752ce369c9902ce1f5f42e893b2bc56' 
  AND token = 'vxkcZMkMmu0IDuyheyunuCScM49pgpU2zUy/Tsyo/Qo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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