Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15cbf2eaa733b219b28e88e9ce72fc827ece5f9ddff54b3ac199c03b79c3a9cc' 
  AND token = 'Fi2OJSB7bqnuPJPaum5PGxp/UcItrnX/EZshQ7xi5fY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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