Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '93b7183791ee7580e5fcb1cf378d1f88e5c7519851df3059fb23f855869ed62c' 
  AND token = 'pq3EJlu3AtIeLGewRqKRpah9UU5pfnzsXLhUwGi/YfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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