Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '21c15adb38dff7e53429ce7c01266f277b7e4758da07f44f2ff0d3be5185adec' 
  AND token = 'Vn3RjvmlrGwpocd7BLCHx7uD5iVvXG0a5YKrXiDTPn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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