Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7839bbd8d5d64ac08448c13fba523d421c819b04019c89a9c716e352b666594' 
  AND token = 'MkgIoOqzCZC+FrWDd43feuK08hWrQdNZ8V+y3Sp9CnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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