Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '210f57f252c8036ee44f446fa95561305209e4da412ca25cc8245a065404665e' 
  AND token = 'SD6Ysj8SzPNwQjpIpAvMr6ERP3QMPVK7r7htnnvJFOc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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