Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53a163ce7545fd0e5a35953bb9306dd808a4d6dd24e9ecfd40b94d5c2c3c81e3' 
  AND token = 'qjmv05yx6Eer93Dyl1APbeA+l43ZvCaJ7vtlfFiAC3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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