Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fbf857bfb2757445ce2f42c43a6da89e3b52fe17aa80617b7a431e978306a42a' 
  AND token = 'yXe13AP7nOdE2gqTDMQg7BmWuVBop6E6oSVU1T8pTeQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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