Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1cb9b3524161d8a2c317be0b7aaa1808c559fbf53b8a3568d9eea25ebc9034da' 
  AND token = 'Po/Q08IdVrsk7VezwHS199XBNY6FGTQGyG0DnEtkkpk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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