Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42fef12ac7d54356a066b5da3da76d01827471b5e08deb82edbd62607b521ffa' 
  AND token = 'YpaX3Mw6GhCRQ+7opcWNO4wCymI7tI+wlrC49zKiWgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}