Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b71141857c65e900ab845604b202d93396dce6395168908fb2b53dd5f2087b2' 
  AND token = 'eAZUL8npBIrRLmD93o/Foruw4UfAwlCUVc7WLTrE6ug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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